fix(date-picker): fix an issue not being able to select to-date (#495)
fix(date-picker): fix an issue not being able to select to-date (#495)

This change introduces a mechanism to distinguish events from Flatpickr and user-initiated events
so that we can avoid setting a date sent from Flatpickr back to Flatpickr.

Fixes #487.
carbon-design-system/carbon-components,carbon-design-system/carbon-components,carbon-design-system/carbon-components